$('.saoma').click(function(){
    console.log('click');
    function uuid() {
      var s = [];
      var hexDigits = "0123456789abcdef";
      for (var i = 0; i < 36; i++) {
        s[i] = hexDigits.substr(Math.floor(Math.random() * 0x10), 1);
      }
      s[14] = "4"; // bits 12-15 of the time_hi_and_version field to 0010
      s[19] = hexDigits.substr((s[19] & 0x3) | 0x8, 1); // bits 6-7 of the clock_seq_hi_and_reserved to 01
      s[8] = s[13] = s[18] = s[23] = "-";

      var uuid = s.join("");
      return (new Date).getTime() + "-" + uuid;
    }

    // 留心：state位置不能变，qrcode实参的text键要用
    let state = uuid()
    $('.saoma-login div').text('')
    jQuery('.saoma-login div').qrcode({
        render: "canvas", 
        foreground: "#000",
        background: "#FFF",
        text: `https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx5a9db0b452e8ca0b&redirect_uri=http://kg.zhaodashen.cn/mt/web/qr/login.jsp&response_type=code&scope=snsapi_base&state=${state}&connect_redirect=1#wechat_redirect`
    });
    const socket = io('http://39.107.231.173:3001');

      // 首次加入服务器监控队列
      // 参数：state  【必须】全球唯一的登录标识
      // 留心：state  是上面uuid()函数生成的
      socket.emit('join', state)

      // 监控服务器推送的登陆信息
      // 留心：超过2分钟不扫码登陆二维码就会过期
      // 过期推送数据：{meta:{state: 400, msg: "二维码已过期"},data:null}
      socket.on('islogin', res => {
          console.log(res.meta)
          console.log(res.data)
          if(res.meta.state==200){
            // h5存储
                sessionStorage.setItem('token',res.data.token)
                sessionStorage.setItem('uname',res.data.uname)
               // 提示登陆成功
               cocoMessage.success("登陆成功，跳转中...");
              // swal({title:`登录成功，跳转中...`,text: "美团提示!",icon: "success",button: "确定!",});
              // 重定向跳转
              setTimeout(()=>{
                location.href = './index.html'
                // history.back()  //从什么网页进回什么网页
              },2000)
          }
    })
  })
